EP 3695147 B1 20210901 - HYDRAULIC SPOOL VALVE
Title (en)
HYDRAULIC SPOOL VALVE
Title (de)
HYDRAULISCHES SCHIEBERVENTIL
Title (fr)
VANNE HYDRAULIQUE À TIROIR
Publication
Application
Priority
- DE 102017217924 A 20171009
- EP 2018076713 W 20181002
Abstract (en)
[origin: WO2019072622A1] The invention relates to a hydraulic spool valve comprising a valve housing (9) which comprises a valve bore (10) having two control chambers (25), which directly follow one after the other axially at a distance and extend beyond the diameter of the valve bore. The valve housing also has, in a connection surface, a pump connection opening (27), which is connected by means of a first fluid channel (26) to a first of the two control chambers, and a consumer connection opening, which is connected by means of a second fluid channel to a second of the two control chambers. The hydraulic spool valve also comprises a control piston (12), which is guided so as to be moveable back and forth in the valve bore to fluidically connect the two control chambers with each other and separate said control chambers from each other. A radial web (55) of the valve housing projects into each control chamber, the extension of said web being delimited in the circumferential direction. To particularly effectively avoid annular flows in the control chambers and flow losses associated therewith, the second web in the second control chamber is longer in the circumferential direction than the first web in the first control chamber.
IPC 8 full level
F16K 11/07 (2006.01); F15B 13/04 (2006.01); F16K 27/04 (2006.01)
CPC (source: EP US)
F16K 11/07 (2013.01 - US); F16K 11/0708 (2013.01 - EP); F16K 27/041 (2013.01 - EP); F16K 31/122 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102017217924 A1 20190411; CN 111183307 A 20200519; CN 111183307 B 20220426; EP 3695147 A1 20200819; EP 3695147 B1 20210901; US 10989324 B2 20210427; US 2020248830 A1 20200806; WO 2019072622 A1 20190418
DOCDB simple family (application)
DE 102017217924 A 20171009; CN 201880065610 A 20181002; EP 18785286 A 20181002; EP 2018076713 W 20181002; US 201816652152 A 20181002